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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTZoN3ctZmM4NC14N3A2
StaticFile.fromUrl can leak presence of a directory
Impact
StaticFile.fromUrl
can leak the presence of a directory on a server when the URL
scheme is not file://
, and the URL points to a fetchable resource under its scheme and authority. The function returns F[None]
, indicating no resource, if url.getFile
is a directory, without first checking the scheme or authority of the URL. If a URL connection to the scheme and URL would return a stream, and the path in the URL exists as a directory on the server, the presence of the directory on the server could be inferred from the 404 response. The contents and other metadata about the directory are not exposed.
This affects http4s versions:
- 0.21.7 through 0.21.23
- 0.22.0-M1 through 0.22.0-M8
- 0.23.0-M1
- 1.0.0-M1 through 1.0.0-M22
Patches
The patch is available in the following versions:
- v0.21.24
- v0.22.0-RC1
- v0.23.0-RC1
- v1.0.0-M23
Note: a previous version of this advisory incorrectly referred to 0.22.0-M9 and 0.23.0-M2.
Workarounds
Don't call StaticFile.fromUrl
with non-file URLs.
For more information
If you have any questions or comments about this advisory:
- Open an issue in the http4s repository
- Disclose further vulnerabilities according to the http4s security policy
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTZoN3ctZmM4NC14N3A2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 3 years ago
Updated: almost 2 years ago
CVSS Score: 5.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
EPSS Percentage: 0.00095
EPSS Percentile: 0.41513
Identifiers: GHSA-6h7w-fc84-x7p6, CVE-2021-32643
References:
- https://github.com/http4s/http4s/security/advisories/GHSA-6h7w-fc84-x7p6
- https://nvd.nist.gov/vuln/detail/CVE-2021-32643
- https://github.com/http4s/http4s/commit/52e1890665410b4385e37b96bc49c5e3c708e4e9
- https://mvnrepository.com/artifact/org.http4s/http4s-core
- https://github.com/advisories/GHSA-6h7w-fc84-x7p6
Blast Radius: 1.0
Affected Packages
maven:org.http4s:http4s-core
Affected Version Ranges: >= 1.0.0-M1, <= 1.0.0-M22, = 0.23.0-M1, >= 0.22.0-M1, <= 0.22.0-M8, >= 0.21.7, < 0.21.24Fixed in: 1.0.0-M23, 0.23.0-RC1, 0.22.0-RC1, 0.21.24